Home / 20,730.40-31,099.02-8,250.50

Finding the Fourth Proportional to 20,730.40, 31,099.02 and 8,250.50

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Solution

The fourth proportional to 20,730.40, 31,099.02 and 8,250.50 is: 12,377.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,730.40 : 31,099.02 = 8,250.50 : x
  2. Step 2: Convert to fraction form
    20,730.40/31,099.02 = 8,250.50/x
  3. Step 3: Cross multiply
    20,730.40x = 31,099.02 × 8,250.50
  4. Step 4: Simplify right side
    20,730.40x = 256,582,464.51
  5. Step 5: Solve for x
    x = 256,582,464.51/20,730.40
  6. Step 6: Final answer
    x = 12,377.11

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.